alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE BePush/Kilim CnC Beacon"; flow:established,to_server; http.method; content:"GET"; http.uri; content:".php?type="; fast_pattern; pcre:"/^(?:update_hash|js|key|arsiv_(?:hash|link))$/R"; http.user_agent; content:!"Mozilla|2f|"; http.host; content:!"threatseeker.com"; http.header_names; to_lowercase; content:!"|0d 0a|accept-"; content:!"|0d 0a|referer|0d 0a|"; reference:md5,dad57ec2d5d99b725acc726b0a644c00; reference:url,seclists.org/fulldisclosure/2015/Jan/131; classtype:command-and-control; sid:2021030; rev:8; metadata:attack_target Client_Endpoint, created_at 2015_04_30, deployment Perimeter, signature_severity Major, tag c2, updated_at 2024_04_21, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)